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Finding the Fourth Proportional to 153,611.68, 211,963.20 and 85,620.58

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Solution

The fourth proportional to 153,611.68, 211,963.20 and 85,620.58 is: 118,144.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,611.68 : 211,963.20 = 85,620.58 : x
  2. Step 2: Convert to fraction form
    153,611.68/211,963.20 = 85,620.58/x
  3. Step 3: Cross multiply
    153,611.68x = 211,963.20 × 85,620.58
  4. Step 4: Simplify right side
    153,611.68x = 18,148,412,122.66
  5. Step 5: Solve for x
    x = 18,148,412,122.66/153,611.68
  6. Step 6: Final answer
    x = 118,144.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.